RRP Upgraded Aluminum Thermostat Housing & Water Pump Assembly
EA888 Gen 3 & Gen 4 – VW / Audi / SEAT / Skoda 1.8T & 2.0T
Upgrade the weak factory plastic thermostat housing with our high-strength aluminum solution engineered for long-term reliability.
Designed for EA888 Gen 3 and Gen 4 engines, this upgraded thermostat housing and water pump assembly eliminates one of the most common failure points found across VW Group vehicles. Unlike OEM and standard aftermarket units that rely on plastic construction prone to cracking, warping, and coolant leaks, our housing is manufactured entirely from aluminum for superior durability under heat and pressure.
Whether you’re maintaining a daily driver or building a high-performance street car, this is the permanent solution enthusiasts and workshops have been waiting for.
Why Upgrade?
The factory thermostat housing is a known weak point on EA888 engines, with coolant leaks and housing failures commonly reported across VW and Audi platforms.
Our upgraded aluminum design offers:
- Full aluminum construction
- Increased resistance to heat cycling
- Improved durability over OEM plastic housings
- Reduced risk of cracking and coolant leaks
- Direct-fit replacement
- Ideal for tuned and performance applications
- 1 Year warranty
Replaces OEM Part Numbers
Thermostat Housing:
- 06L121111H
- 06L121111J
- 06L121111K
- 06L121111M
- 06L121111N
- 06L121111P
- 06L121111G
- 06L121111F
- 06L121111K
- 06L121111L
Water Pump:
- 06L121012A
- 06L121012H
- 06L121012K
- 06L121012L
- 06L121012M
Vehicle Compatibility
Compatible with many 1.8T & 2.0T EA888 Gen 3 and Gen 4 equipped vehicles including:
Audi
- A3 / S3
- A4 / A5
- Q3 / Q5
- TT / TTS
- S1
Volkswagen
- Golf GTI / Golf R
- Arteon
- Passat B8
- Tiguan
- T-Roc
SEAT / Cupra
- Leon
- Ateca
- Formentor
Skoda
- Octavia
- Superb
- Kodiaq
(Please verify compatibility using your OEM part number before ordering.)
The Enthusiast Solution
OEM and standard aftermarket replacement units continue to use plastic construction, even though thermostat housing failure is widely recognized across EA888 platforms.
Our aluminum assembly is designed for owners who want to fix the issue once — and properly.
Built for reliability. Engineered to last.